Wednesday, April8, 2020
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Marine Weather and Tides
Larkspur, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:42AMSunset 7:41PM Wednesday April 8, 2020 7:31 AM PDT (14:31 UTC) Moonrise 7:44PMMoonset 6:26AM Illumination 100% Phase: Full Moon; Moon at 15 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 237 Am Pdt Wed Apr 8 2020
Today..SW winds 5 to 15 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..S winds up to 10 kt.
Thu night..W winds 5 to 10 kt.
Fri..W winds 5 to 15 kt with gusts up to 25 kt.
Fri night..W winds 5 to 15 kt.
Sat..SW winds up to 10 kt.
Sun..NW winds up to 10 kt.
PZZ500 237 Am Pdt Wed Apr 8 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... The low pressure system continues to slowly move over southern california and farther inland. Northwest winds will remain breezy through the morning and then decrease. Lightly scattered showers over the southern waters are possible. Northwest swell through the week, with a long period southerly swell that gradually decreases.


7 Day Forecast for Marine Location Near Larkspur, CA
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location: 37.94, -122.53     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 081148 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 448 AM PDT Wed Apr 8 2020

SYNOPSIS. Isolated to scattered rain showers will be possible over the Central Coast through midweek while mainly dry conditions prevail to the north. Temperatures will begin a gradual warming trend late in the week and into the upcoming weekend as conditions dry out region-wide.

DISCUSSION. as of 2:55 AM PDT Wednesday . The pesky low pressure system that brought a variety of weather to the Bay Area and Central Coast the last few days remains off the coast. Overnight satellite imagery shows a broad circulation, with embedded smaller circulations, spinning near the Channel Islands. The cyclonic flow continues to advect moisture around the slow moving low pressure. The advecting moisture has resulted in bands of scattered showers moving over the San Joaquin Valley and southern Monterey/San Benito. Over the last six hours a few gauges have tipped in southern Monterey/San Benito with a few hundredths up to a few tenths. It should be noted shower activity is struggling to have any additional northern movement. Latest hi-res models, like the HRRR and local WRF, keep showers chances through day, but mainly south of San Jose. In fact, most likely locations for showers will still be confined to Monterey/San Benito, but a stray shower could drift north. The cold low pressure will make for an interesting split with temperatures around the Bay Area/Central Coast. Southern areas will remain seasonably cool with filtered sunshine/showers (Monterey Bay region southward) and northern areas will be mild an in a few spots above normal (San Jose northward).

For tonight, the low finally moves eastward and begins its slow exit of California. Before it finally exits a few additional bands of showers may drift across the forecast area Wednesday night and Thursday. Once again, best chance for precip will be south of San Jose. Additional rainfall will generally be light. Given the recent rain and lingering low level moisture patchy fog will be possible Wednesday night and early Thursday.

Showers will end by Thursday night with a warming and drying trend developing. Warmer and drier conditions are expect over the weekend and into early next week.

AVIATION. as of 4:46 AM PDT Wednesday . for 12Z TAFs. A thick layer of stratus sits just off the coastline over the ocean, while higher clouds spill over head associated to the weather system over Southern California, tracking southeast. MVFR to VFR at this hour. Locally varying winds will transition back to onshore and strengthen in the afternoon as cloud cover lingers providing MVFR conditions possible through the TAF period.

Vicinity of KSFO . MVFR at KSFO and KOAK due to stratus clouds spilling into the Bay, with VFR elsewhere. Cigs are forecast to lift to around 3,000 feet in the afternoon. Lower clouds for MVFR conditions return in the evening for the remainder of the TAF period. Winds are breezy and will re-strengthen and be onshore in the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Closer to the coast, winds are breezy with cigs around 1,500 feet and MVFR conditions. Farther inland and winds are calmer with VFR. Winds will become onshore and strengthen in the afternoon with cigs only lifting to around 2,500 feet. Isolated showers are possible in the evening.

MARINE. as of 02:37 AM PDT Wednesday . The low pressure system continues to slowly move over southern California and farther inland. Northwest winds will remain breezy through the morning and then decrease. Lightly scattered showers over the southern waters are possible. Northwest swell through the week, with a long period southerly swell that gradually decreases.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pigeon Pt 10-60 nm until 3 PM SCA . Pt Arena to Pt Reyes 0-10 nm until 9 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 9 AM



PUBLIC FORECAST: MM AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi45 min ESE 1.9 51°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 6 mi43 min SSW 2.9 G 5.1 52°F 56°F1014 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi43 min SSW 7 G 11 53°F 1014.5 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi43 min 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 12 mi43 min WSW 6 G 9.9 51°F 1013.3 hPa
46237 - San Francisco Bar, CA (142) 12 mi61 min 55°F5 ft
PXSC1 12 mi43 min 53°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi43 min WNW 5.1 G 8 51°F 1014.4 hPa
OBXC1 14 mi49 min 52°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi43 min W 5.1 G 6
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi43 min SW 4.1 G 5.1 52°F 1013.9 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi43 min W 1 G 4.1 51°F 58°F1014.5 hPa
LNDC1 17 mi43 min W 2.9 G 5.1 52°F 1014.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi31 min NW 9.7 G 12 51°F 52°F1015 hPa (-0.3)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi43 min NW 4.1 G 5.1 51°F 57°F1014.1 hPa
UPBC1 23 mi43 min NW 5.1 G 6
PCOC1 - 9415144 - Port Chicago, CA 27 mi43 min SW 6 G 7 50°F 57°F1013.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 32 mi106 min W 4.1
RTYC1 - 9414523 - Redwood City, CA 34 mi43 min 59°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 35 mi43 min NNW 8.9 G 11 53°F 1013.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi31 min NNW 12 G 16 51°F 53°F1015.6 hPa49°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi31 min NNW 16 G 19 1014.6 hPa (+1.3)
46214 - Point Reyes, CA (029) 49 mi31 min 53°F9 ft

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA14 mi56 minNNW 810.00 miFair41°F41°F100%1014.6 hPa
Petaluma Municipal Airport, CA22 mi36 minN 09.00 miFair43°F42°F100%1014.6 hPa
Napa, Napa County Airport, CA23 mi37 minN 410.00 miOvercast50°F46°F89%1013.5 hPa
Oakland, Metro Oakland International Airport, CA23 mi38 minW 56.00 miFog/Mist53°F48°F83%1014.9 hPa
San Francisco, San Francisco International Airport, CA24 mi35 minSE 910.00 miOvercast52°F46°F80%1014.8 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmN4N4NE4CalmCalmCalmNW9W6NW9NW4W7Calm3E44S4CalmSE4CalmN4N4Calm
1 day agoCalmN6N64CalmCalmSW6SW6SW4SE11SW7S5CalmCalmCalmCalmCalmSW4S7NW5CalmN6NW5N3
2 days agoW4SW8
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Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Wed -- 12:58 AM PDT     6.12 feet High Tide
Wed -- 06:43 AM PDT     Sunrise
Wed -- 07:09 AM PDT     -0.25 feet Low Tide
Wed -- 07:25 AM PDT     Moonset
Wed -- 01:27 PM PDT     5.63 feet High Tide
Wed -- 07:17 PM PDT     0.54 feet Low Tide
Wed -- 07:40 PM PDT     Sunset
Wed -- 08:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.76.15.74.631.40.2-0.2012.33.74.85.55.54.83.62.21.10.60.71.62.84.2

Tide / Current Tables for Red Rock .1 E, San Francisco Bay, California Current
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Red Rock .1 E
Click for Map
Wed -- 02:31 AM PDT     -0.01 knots Slack
Wed -- 05:14 AM PDT     -2.04 knots Max Ebb
Wed -- 06:43 AM PDT     Sunrise
Wed -- 07:25 AM PDT     Moonset
Wed -- 08:25 AM PDT     0.00 knots Slack
Wed -- 11:39 AM PDT     1.82 knots Max Flood
Wed -- 03:10 PM PDT     -0.01 knots Slack
Wed -- 05:39 PM PDT     -1.75 knots Max Ebb
Wed -- 07:39 PM PDT     Sunset
Wed -- 08:43 PM PDT     0.00 knots Slack
Wed -- 08:43 PM PDT     Moonrise
Wed -- 11:49 PM PDT     1.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.10.4-0.5-1.5-2-1.9-1.3-0.40.51.31.71.81.50.90.1-0.9-1.6-1.7-1.3-0.60.20.91.5

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (10,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.